"'Electronic waste', 'e-waste' or Waste Electrical and Electronic Equipment (WEEE) refers to electrical and electronic equipment, whole or in part included in, which is intended to be discarded. It usually includes all secondary computers, entertainment device electronics, mobile phones, television sets, other electrical and electronic items whether sold, donated, or discarded by their original owners."

Ewaste, a rapidly growing hazardous waste stream, both in volume and complexity, has a negative impact on the environment. It contains following toxic substances- lead, cadmium, mercury and hexavalent chromium plastics including PVC, BFRs, Barium, beryllium, carcinogens, such as carbon black, phosphor, and various heavy metals. This deadly mix can cause serious, even fatal, health problems for those handling the waste in an improper way.

Constituents Source Health Effects
Lead (Pb) Solder in printed circuit boards, glass panels and gaskets in computers monitors. Damage to central and peripheral nervous systems and kidney damage; affects brain developments of children.
Cadmium (Cd) Chip resistors and semiconductors Toxic irreversible effects on human health; accumulates in kidney and liver; causes neural damage; teratogenic.
Mercury (Hg) Relays and switches, Printed circuit boards Chronic damage to the brain; respiratory and skin disorders due to bioaccumulations in fishes.
Hexavalent chromium (Cr) Corrosion protection of untreated and galvanized steel plates, decorator, or hardner for steel housing Asthmatic bronchitis; DNA damage
Plastic including PVC Cabling and computer housing Burning produces dioxin it causes: Reproductive and development problems, immune system damage; interface with regulatory hormones.
Brominated Flame Retardants (BFR) Plastic Housing of electronic equipments and circuit boards. Disrupts endocrine system functions
Barium (Ba) Front panel of CRTs Short term exposure causes:
> Muscle weakness
> Damage to heart, liver and spleen
Beryllium (Be) Motherboard Carcinogenic (Lung Cancer) : inhalation of the fumes and dust causes chronic beryllium disease or beryllicosis 
> Skin diseases such as warts.